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1.13.11.51: 9-cis-epoxycarotenoid dioxygenase

This is an abbreviated version!
For detailed information about 9-cis-epoxycarotenoid dioxygenase, go to the full flat file.

Word Map on EC 1.13.11.51

Reaction

9'-cis-neoxanthin
+
O2
=
2-cis,4-trans-xanthoxin
+
(3S,5R,6R)-5,6-dihydroxy-6,7-didehydro-5,6-dihydro-12'-apo-beta-caroten-12'-al

Synonyms

9,10[9',10']carotenoid cleavage dioxygenase, 9-cis epoxycarotenoid dioxygenase, 9-cis-epoxcarotenoid dioxygenase, 9-cis-epoxicarotenoid dioxygenase, 9-cis-epoxycarotenoid dioxygenase, 9-cis-epoxycarotenoid dioxygenase 3, 9-cis-epoxycarotenoid dioxygenase 4, 9-cis-epoxycarotenoid dioxygenase 6, 9-cis-epoxycarotenoid dioxygenase1, 9-cis-epoxycarotenoid dioxygenase4, AtCCD1, AtNCED3, B-diox-II, carotenoid cleavage dioxygenase, carotenoid cleavage dioxygenase 1, CCD, CCD1, CCD7, CCD8, CitNCED2, CitNCED3, CMNCED1, CsNCED1, CsNCED2, DHN2, DKNCED1, LeNCED1, LeNCED2, LsNCED1, LsNCED2, LsNCED3, LsNCED4, NCED, NCED 3, NCED1, NCED2, NCED2A, NCED2B, NCED2D, NCED3, NCED3a, NCED4, NCED5, NCED6, NCED9, nine-cis-epoxy dioxygenase, nine-cis-epoxycarotenoid dioxygenase, nine-cis-epoxycarotenoid dioxygenase 3, NosCCD, Nostoc carotenoid cleavage dioxygenase, NSC1, NSC2, NSC3, PpNCED1, PpNCED2, putative carotenoid cleavage dioxygenase, PvNCED1, SgNCED1, STO1, VP14, VP14 epoxy-carotenoid dioxygenase, VP14 protein, VuNCED1 protein, VvNCED1

ECTree

     1 Oxidoreductases
         1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)
             1.13.11 With incorporation of two atoms of oxygen
                1.13.11.51 9-cis-epoxycarotenoid dioxygenase

Systematic Name

Systematic Name on EC 1.13.11.51 - 9-cis-epoxycarotenoid dioxygenase

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SYSTEMATIC NAME
IUBMB Comments
9-cis-epoxycarotenoid 11,12-dioxygenase
Requires iron(II). Acts on 9-cis-violaxanthin and 9'-cis-neoxanthin but not on the all-trans isomers [2,3]. In vitro, it will cleave 9-cis-zeaxanthin. Catalyses the first step of abscisic-acid biosynthesis from carotenoids in chloroplasts, in response to water stress. The other enzymes involved in the abscisic-acid biosynthesis pathway are EC 1.1.1.288 (xanthoxin dehydrogenase), EC 1.2.3.14 (abscisic-aldehyde oxidase) and EC 1.14.13.93 [(+)-abscisic acid 8'-hydroxylase].